Hard but not impossible. There is a tutorial on my YouTube site as well as the shadow vid, but I had to choose which video to link here, and the attached video shows the lines of sight through the shape very well. If you want to build this, attempt the other spider ball design first, to get the idea.
The structure is entirely single rows of magnets, except for the nodes. At these nodes, in the interior, a single ball is the tip of 3 triangles which converge at the node.